Oil Flowmeters | McMaster-Carr

	For Use With For Use With

Oil

Diesel Fuel

Gasoline

Kerosene

Water with
Solids

	Pipe Size Pipe Size

	Thread Type Thread Type

NPTF

NPT

	Flow Measurement Scale Flow Measurement Scale

Gallons per Minute

Liters per Minute

	Maximum Pressure Maximum Pressure

	Display Type Display Type


Scale	Digital

	Maximum Temperature Maximum Temperature

	Mounting Orientation Mounting Orientation

Any Position

Horizontal

Vertical

	Mounting Location Mounting Location

Inline

Portable

	Fitting Material Fitting Material

Aluminum

Plastic

Brass

	Body Material Body Material

Aluminum

Plastic

Stainless Steel

	Minimum Temperature Minimum Temperature

	Direction of Flow Direction of Flow

	End-to-End Length End-to-End Length

	Gender Gender

Female

Male

	Seal Material Seal Material

Rubber

Stainless Steel

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Flow Maximum Flow

	Volume Measurement Scale Volume Measurement Scale

Liters

Ounces

Gallons

	Minimum Flow Minimum Flow

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Reset Type Reset Type

None

Button

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34 Products

About Flowmeters and Totalizers

Flowmeters measure the rate of flow for a liquid or a gas. Totalizers measure the cumulative flow volume. Flowmeter/totalizers display both the flow rate and the cumulative flow volume.

Flowmeter

Flowmeter with Pressure Gauge and Valve

Designed for more than 10 times the pressure of standard flowmeters for oil, these are rated for pressures up to 3,500 psi. They install directly in your pipeline. The dual scale shows readings in both gallons per minute and liters per minute and rotates 360° for viewing at multiple angles.

Pressure gauge and valve let you test flow and pressure. Open the valve to read maximum flow at zero pressure; close the valve to test the performance of pumps and other equipment under pressurized conditions.

			Pressure Gauge
Pipe Connections	End-to-End Lg.	Accuracy	Range	Dial Size	Max. Pressure	Temp. Range, °F	Seal Material	Mounting Orientation	Choose a Flow Range, gpm		Each
Aluminum Body with Aluminum Fittings
Gallons per Minute, Liters per Minute
1/4 NPTF Female	4 13/16"	±7%	__	__	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	0.02 to 0.2, 0.05 to 0.5, 0.1 to 1, 0.2 to 2	0000000	0000000
1/2 NPTF Female	6 5/8"	±2%	__	__	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	0.1 to 1, 0.5 to 5, 1 to 10, 1 to 15	0000000	000000
3/4 NPTF Female	7 1/4"	±2%	__	__	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	1 to 10, 2 to 20, 3 to 30	0000000	000000
1 NPTF Female	7 1/4"	±2%	__	__	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	1 to 10, 2 to 20, 3 to 30, 4 to 40	0000000	000000
1 1/4 NPTF Female	12 1/4"	±2%	__	__	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	10 to 100, 5 to 50	0000000	000000
Aluminum Body with Aluminum Fittings and Aluminum Valve
Gallons per Minute, Liters per Minute
1/2 NPTF Female	10 5/16"	±2%	0 to 3,500	2 1/2"	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	1 to 15	0000000	000000
3/4 NPTF Female	11 5/16"	±2%	0 to 3,500	2 1/2"	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	2 to 20, 3 to 30	0000000	000000
1 1/4 NPTF Male Inlet × 1 1/4 NPTF Female Outlet	22"	±2%	0 to 3,500	2 1/2"	3,500 psi @ 70° F	-20° to 240°	Fluoroelastomer Rubber	Any Position	10 to 100	0000000	00000000

Flowmeters for Oil

Measure the flow rate of hydraulic and motor oil. These flowmeters have a transparent body to inspect liquid color and clarity in addition to flow. They have union nuts for quick installation and removal from your system. The dual scale is marked in both gallons per minute and liters per minute.

Brass fittings are more durable than polysulfone fittings.

For technical drawings and 3-D models, click on a part number.

Polysulfone Plastic Body with Polysulfone Plastic Fittings
Pipe Connections	End-to-End Lg.	Accuracy	Max. Pressure	Temp. Range, °F	Seal Material	Mounting Orientation	Includes	Choose a Flow Range, gpm		Each
Gallons per Minute, Liters per Minute
1/2 NPTF Female	7 3/16"	±5%	325 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any Position	Union Nuts	0.5 to 5, 1 to 10	0000000	0000000
3/4 NPTF Female	7 9/16"	±5%	325 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any Position	Union Nuts	1 to 10, 1 to 15	0000000	000000
1 NPTF Female	7 9/16"	±5%	325 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any Position	Union Nuts	1 to 15, 3 to 30	0000000	000000
Polysulfone Plastic Body with Brass Fittings
Gallons per Minute, Liters per Minute
1/2 NPTF Female	7 3/16"	±5%	325 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any Position	Union Nuts	0.5 to 5, 1 to 10	0000000	000000
3/4 NPTF Female	7 9/16"	±5%	325 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any Position	Union Nuts	1 to 10, 1 to 15	0000000	000000
1 NPTF Female	7 9/16"	±5%	325 psi @ 70° F	33° to 200°	Fluoroelastomer Rubber	Any Position	Union Nuts	1 to 15, 3 to 30	0000000	000000

High-Temperature Flowmeters for Oil

With double the temperature rating of standard flowmeters for oil, these can measure the flow rate of oil at temperatures up to 400° F. They install directly in your pipeline. The dual scale shows readings in both gallons per minute and liters per minute and rotates 360° for viewing at multiple angles.

For technical drawings and 3-D models, click on a part number.

Aluminum Body with Aluminum Fittings
Pipe Connections	End-to-End Lg.	Accuracy	Max. Pressure	Temp. Range, °F	Seal Material	Mounting Orientation	Choose a Flow Range		Each
Gallons per Minute, Liters per Minute
3/4 NPTF Female	7 1/4"	±2%	3,500 psi @ 70° F	-20° to 400°	Fluoroelastomer Rubber	Any Position	0.5 to 5, 1 to 10	00000000	0000000
1 NPTF Female	7 1/4"	±2%	3,500 psi @ 70° F	-20° to 400°	Fluoroelastomer Rubber	Any Position	1 to 10, 3 to 30	00000000	000000
1 1/2 NPTF Female	12 1/4"	±2%	3,500 psi @ 70° F	-20° to 400°	Fluoroelastomer Rubber	Any Position	10 to 100	00000000	00000000

Digital Flowmeters for Water with Solids

Polycarbonate Plastic

Also called Doppler flowmeters, these use ultrasonic waves to spot check flow rate throughout your system. They are for water containing particles 100 microns (similar to flour) or larger. Flowmeters only provide accurate readings for water with a minimum particle concentration of 100 ppm.

Polycarbonate Plastic Body
For Pipe Diameter	End-to-End Lg.	Overall Ht.	Velocity Range	Accuracy	Temp. Range, °F	Voltage	Electrical Connection Type	Features	Environmental Rating		Each
Gallons per Minute
1/4" to 1"	5 3/4"	7"	0.15 to 30 ft./sec.	±2%	-40° to 185°	115V AC	Wire Leads	Flow-Rate Calculator in gpm	IP65, NEMA 4	00000000	000000000
1" to 60"	5 3/4"	7"	0.15 to 30 ft./sec.	±2%	-40° to 185°	115V AC	Wire Leads	Flow-Rate Calculator in gpm	IP65, NEMA 4	00000000	00000000

Flowmeter/Totalizers for Oil and Fuel

Use these flowmeter/totalizers to measure both the flow rate and total flow volume of oil, gasoline, diesel fuel, and kerosene. They display a batch total volume that can be reset after each metering application and a total flow volume that cannot be reset. All flowmeter/totalizers are FM approved for Class I, Divisions 1 and 2, Groups A, B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 hazardous locations. They have an enclosure that meets NEMA 4 for protection from dirt and washdowns.

Certificate of calibration traceable to NIST states that the flowmeter/totalizer has passed a test for accuracy.

Optional remote panel-mounting kit lets you mount the meter’s display up to 100 feet away. It includes a sensor module and 10 feet of cable with wire leads.

Hazardous location environmental ratings indicate where manufacturers have included safety features in products to facilitate their safe use in hazardous environments. Before selecting a product for a hazardous location, ensure it is rated for your environment. See About Hazardous Location Environmental Ratings.

Aluminum Body with 316 Stainless Steel Seal—14° to 140° F

Flowmeter/Totalizers										Replacement Displays
Pipe Connections	End-to-End Lg.	Flow Range, gpm	Accuracy	Max. Total Volume, units	Max. Pressure	Mounting Orientation	Batteries Included		Each		Each
Flowmeter/Totalizers
Gallons per Minute, Liters per Minute
1 NPT Female	4"	0.3 to 3	±5%	999,999	300 psi @ 70° F	Horizontal, Vertical	Yes	00000000	0000000	00000000	0000000
1 NPT Female	4"	3 to 50	±1.5%	999,999	300 psi @ 70° F	Horizontal, Vertical	Yes	00000000	000000	00000000	000000
2 NPT Female	6"	30 to 300	±1.5%	999,999	300 psi @ 70° F	Horizontal, Vertical	Yes	00000000	00000000	00000000	000000
Flowmeter/Totalizers with Certificate of Calibration Traceable to NIST
Gallons per Minute, Liters per Minute
1 NPT Female	4"	0.3 to 3	±5%	999,999	300 psi @ 70° F	Horizontal, Vertical	Yes	00000000	000000	00000000	000000
1 NPT Female	4"	3 to 50	±1.5%	999,999	300 psi @ 70° F	Horizontal, Vertical	Yes	00000000	000000	00000000	000000
2 NPT Female	6"	30 to 300	±1.5%	999,999	300 psi @ 70° F	Horizontal, Vertical	Yes	00000000	00000000	00000000	000000

Accessories

			Pkg.
Component	Pkg. Qty.		Each
4-20 mA Output Module	__	00000000	0000000
Pulse Output Module	__	00000000	000000
Remote Panel-Mounting Kit	__	00000000	000000
Disposable Batteries	4	00000000	0000

Totalizers for Oil

Use these totalizers to measure the total flow volume of light oils. They have a button to reset the total volume to zero. All can activate automatically or manually, and they automatically shut down 40 seconds after flow stops. Totalizers can be programmed to display readings in gallons, liters, or ounces.

Totalizer with a 316 stainless steel body is more corrosion resistant and durable than the totalizer with a nylon body.